Generate fake data with faker.js

[Strajk]

Screenshot-2024-11-29T19.29.38.mp4

Open faker in Script Kit

// Name: Faker
// Description: Generate fake data with faker.js
// Author: Pavel 'Strajk' Dolecek
// Twitter: @straaajk

import "@johnlindquist/kit"

import { faker } from '@faker-js/faker';
import { Choice } from "@johnlindquist/kit";

const CACHE_EXPIRATION = 1000 * 60 * 60 * 24 * 30 // 1 month
// const CACHE_EXPIRATION = 1000 * 15 // 15 seconds // uncomment for debugging

// @ts-ignore kitCommand is defined, but it's not in types :(
const keyv = await store(kitCommand, {cachedChoices: null, cachedChoicesExpires: null})
const maybeCachedChoices = await keyv.get('choices') as Choice[] | null
const maybeCachedChoicesExpires = await keyv.get('cachedChoicesExpires') as number | null

const EXAMPLES_MAX_COUNT = 5
const EXAMPLES_MAX_CHARS = 120

const modulesToIgnore = [
  "_defaultRefDate",
  "_randomizer",
  "datatype", // just boolean
  "helpers",
  "rawDefinitions",
  "definitions",
]

const methodsToIgnore = [
  "faker",
]

const pairsToIgnore = [
  "internet.userName", // deprecated in favour of internet.username
  "image.avatarLegacy", // deprecated in favour of image.avatar

  // requires params, which would require special handling
  "string.fromCharacters",
  "date.between",
  "date.betweens",
]

let choices = []
if (
  maybeCachedChoices?.length > 0
  && maybeCachedChoicesExpires > Date.now()
) {
  // console.log("Using cached choices")
  choices = maybeCachedChoices as Choice[]
} else {
  // console.log("Generating choices")
  for (const module in faker) { // date, number, string, finance, ...
    if (modulesToIgnore.includes(module)) {
      continue;
    }

    for (const method in faker[module]) {
      if (methodsToIgnore.includes(method)) {
        continue;
      }

      const pair = `${module}.${method}`;
      if (pairsToIgnore.includes(pair)) {
        continue;
      }

      let examplesCount = 0;
      let examplesText = "";
      while (examplesText.length < EXAMPLES_MAX_CHARS && examplesCount < EXAMPLES_MAX_COUNT) {
        const newExample = callFaker(module, method);
        if (examplesText.length > 0) {
          examplesText += " • "
        }
        examplesText += toString(newExample);
        examplesCount++;
      }
      examplesText = examplesText.trim().substring(0, EXAMPLES_MAX_CHARS);

      choices.push({
        name: `${module}: ${method}`,
        value: pair,
        description: examplesText,
      })
    }
  }
  await keyv.set('choices', choices)
  await keyv.set('cachedChoicesExpires', Date.now() + CACHE_EXPIRATION)
}

const selected = await arg({
  placeholder: "Select a Faker module and method",
  choices: choices,
  enter: "Copy to clipboard",
})

let [module, method] = selected.split(".")
let value = toString(callFaker(module, method))

await copy(value)
await notify(`Copied: ${value}`)

// Helpers
// ===
function callFaker(module: string, method: string) {
  try {
    return faker[module][method]()
  } catch (error) {
    console.error(`Error calling faker method: ${module}.${method}`, error);
    return
  }
}

function toString(value: any): string {
  if (typeof value === "string") {
    return value
  } else if (typeof value === "object") {
    return JSON.stringify(value)
  } else {
    return value?.toString() || "❌"
  }
}